Bumbas Boost Inserts

Bumbas Boost dual-sided adhesive is lab-tested for water, sweat, and high-impact motion, so it grips both your skin and your bra lining from yoga flow to pool plunge. 

The silicone flexes with every move, eliminating corner lift or shifting. 

Pop them in, press for three seconds, and you’re locked in for the day. 

Thousands of customers have sprinted, danced, and swum—no slips, just lift.

Match the insert to your current cup(e.g., wear a 34 B → choose size B). 

The ultra-thin silicone molds inside the cup, so your band and straps stay exactly the same. 

If your cups already feel snug at the top, simply loosen your straps a notch or use a bra with a touch more depth for extra comfort. 

The result: easy sizing and a natural lift that looks—and feels—made for you.

Our quick chart above covers every band/cup combo—and our fit team is on standby if you need a second opinion.

We use hypoallergenic, medical-grade silicone approved for daily skin contact—even on ultra-sensitive types. 

No latex, no harsh glues, zero itch or redness reported in our wearer trials. Just a secure, gentle hold you’ll forget is there until you peel it off. 

Rinse, air-dry, and the adhesive refreshes for tomorrow.

Not a chance of spotting them! 

Each insert tapers to under 1 mm at the edge, melting into the cup so there’s no ridge under tees, lace, or silk. Skin-tone shades keep the look seamless in sheer tops and swimwear. 

Friends will notice your gorgeous shape, not what’s creating it. 

Confidence: on display; inserts: your little secret.

With a quick rinse in mild soap and an overnight air-dry, Bumbas Boost stays sticky and shape-perfect for at least 50 wears—often more. 

Alternating pairs (hello, 2-pack!) lets each set “rest,” extending life even further. More wears = lower cost per lift.

Silicone doesn’t make you hotter—it simply rests against your skin without trapping extra heat. 

Keep cool by wiping off any natural perspiration before placement—our adhesive is engineered to stay locked during sweltering summer walks, HIIT sessions, and pool days alike. 

The medical-grade material is naturally odor-neutral, and a rinse after wear keeps it fresh. 

Heavy sweater? Lightly dust baby powder under the bust and you’re breezy all day.

We are proud to offer fast & reliable shipping on all orders!

Order processing usually takes 2-4 business days before shipment. Once shipped, the estimated delivery time is:

- USA: 3-7 business days
- Canada: 5-10 business days
- UK: 5-10 business days
- Rest of world: 6-14 business days

The Bumbas Boost Inserts work best with tight fitted, structured, tops and swimsuits.

They are not designed for loose fitted clothing, such as t-shirts.

We want you head-over-heels. Try Bumbas Boost for 60 days; if they’re not the confidence game-changer you hoped for, send them back for a full refund—no questions asked. 

Keep the bonus nipple covers as our thank-you for giving us a whirl. 

That’s how sure we are you’ll never want to be without them again.